singal offline push

pkg/common/config/config.go

@@ -419,6 +419,11 @@ type config struct {
 			OfflinePush  POfflinePush  `yaml:"offlinePush"`
 			DefaultTips  PDefaultTips  `yaml:"defaultTips"`
 		} `yaml:"joinDepartmentNotification"`
+		Signal struct {
+			OfflinePush struct {
+				Title string `yaml:"title"`
+			} `yaml:"offlinePush"`
+		} `yaml:"signal"`
 	}
 	Demo struct {
 		Port         []int  `yaml:"openImDemoPort"`